Usually, when I felt stressed that means I have a problem. Therefore, I would try to solve the problem. However, if I need advice, I would consult my parents, friends and professors. Also, if I have bad grades, I will analyze how I studied and what I did wrong in the test to prevent myself from getting another bad grade.
Sometimes, this question can rephrase into "What do you do to relieve stress?"
Therefore, answer this question as how you manage stress in school.